Quick answerMove the client out of the room, then close the door behind them.
Why this is correctThe client is in the room where the fire is, and supplemental oxygen makes that space burn faster. Rescue is the first step of the response sequence, and closing the door immediately after adds containment without costing time.
Easy analogy or mental picturePeople leave the burning building before anyone looks for the fire extinguisher. The image conveys the ordering and does not mean the other steps are skipped.
Memory hookRescue, alarm, contain, extinguish, in that order.NCLEX decision ruleIn a fire, remove people in immediate danger first, then activate the alarm, contain the fire, and extinguish it. Supplemental oxygen raises urgency without changing the order.
Why the other choices are wrongShutting off oxygen, pulling the alarm, and using an extinguisher are all genuine steps, but each leaves the client inside the room a little longer.